Thermador Range Error Code E:08

The E:08 code on a Thermador WFMC washer indicates that the heater is not shutting off as commanded during the wash cycle. The appliance has detected continuous heater operation beyond its intended duration. This is typically caused by a stuck heater relay on the control board or a faulty heating element. The washer will halt operation to prevent overheating.

Yes, this fault represents a real safety concern because a heater that cannot shut off can overheat the wash water and potentially damage the appliance or its surroundings. You should not attempt to run the washer while this error is active. Disconnect power to the unit until the fault has been diagnosed and repaired.

A power reset may temporarily clear the error display, but it will not resolve the underlying hardware fault. If the heater relay is stuck or the heating element is shorted, the E:08 code will return as soon as the appliance attempts to heat water again. The faulty component must be repaired or replaced to permanently clear the code.

A knowledgeable DIYer can diagnose this fault by testing the heating element for resistance and visually inspecting the control board relay for burn damage. However, replacing the control board or heating element requires disassembly of the appliance and comfort working with electrical components. If you are not confident working with wiring and circuit boards, a qualified technician is recommended.

Repair costs depend on the failed component. A replacement heating element typically costs between $30 and $80 for the part alone. A replacement control board can range from $100 to $250 or more depending on availability. Adding professional labor, total repair costs commonly fall between $150 and $400 depending on the technician and the specific part required.